Journal Article10.1088/0953-4075/41/8/081006
From non-sequential to sequential strong-field multiple ionization: identification of pure and mixed reaction channels
Artem Rudenko,Th. Ergler,K. Zrost,Bernold Feuerstein,V. L. B. de Jesus,C. D. Schröter,R. Moshammer,Joachim Ullrich +7 more
TL;DR: In this article, a reaction microscope was used to characterize the transition regime between non-sequential and sequential strong-field ionizations, showing that pure and/or mixed recollision-induced (e, ne)-like reactions and sequential (field-induced) processes can be distinguished.
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Abstract: Momentum distributions of Ne3–4+ ions created by 795 nm, 25 fs laser pulses have been measured at 1015–2 × 1016 W cm−2 using a 'reaction microscope' in order to characterize the transition regime between non-sequential and sequential strong-field ionizations. We can clearly separate pure and/or mixed recollision-induced (e, ne)-like reactions and sequential (field-induced) processes, and observe transition intensities which agree with recently reported ion-yield data. Our results provide consistent qualitative description of Ne strong-field multiple ionization for all non-relativistic intensities.
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Citations
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Laser-assisted collision effect on non-sequential double ionization of helium in a few-cycle laser pulse
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Angular distributions and correlations in sequential two-photon atomic double ionization
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Semiclassical study of nonsequential triple ionization of Ar in strong laser fields
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TL;DR: In this paper, a classical trajectory Monte Carlo simulation was used to reveal the mechanisms of triple ionization in strong laser fields, including multiple recollision and sequential ionization, by tracing electrons' trajectories, and showed it is possible to control the cascade channel and extract it through the ion momentum distribution.
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References
Momentum distributions of ne(n+) ions created by an intense ultrashort laser pulse
R. Moshammer,B. Feuerstein,W. Schmitt,Alexander Dorn,C. D. Schröter,Joachim Ullrich,Horst Rottke,C. Trump,M. Wittmann,Georg Korn,Klaus Hoffmann,W. Sandner +11 more
TL;DR: Vector momentum distributions of Ne(n+) (n = 1,2,3) ions created by 30 fs, approximately 1 PW/cm(2) laser pulses at 795 nm have been measured using recoil-ion momentum spectroscopy, ruling out mechanisms based on an instantaneous release of two (or more) electrons as a dominant contribution to nonsequential strong-field multiple ionization.
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Intense-field many-body S-matrix theory
Andreas Becker,Farhard Faisal +1 more
TL;DR: In this paper, the authors present a consistent S-matrix formulation of the quantum amplitude for high harmonic generation (HHG) and point out some of the most general properties of HHG radiation emitted by a single atom as well as its relation to coherent emission from many atoms.
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Binary and recoil collisions in strong field double ionization of helium.
André Staudte,Camilo Ruiz,Markus Schöffler,S. Schössler,D. Zeidler,Th. Weber,M. Meckel,David M. Villeneuve,Paul B. Corkum,Andreas Becker,Reinhard Dörner +10 more
TL;DR: A so-far unobserved fingerlike structure in the correlated electron momentum distribution is found, interpreted as a signature of the microscopic dynamics in the recollision process and supported by analyzing ab initio solutions of a fully correlated three-dimensional helium model.
Correlated two-electron momentum spectra for strong-field nonsequential double ionization of He at 800 nm.
Artem Rudenko,V. L. B. de Jesus,Th. Ergler,K. Zrost,Bernold Feuerstein,C. D. Schröter,R. Moshammer,Joachim Ullrich +7 more
TL;DR: In contrast with earlier experimental results, but in agreement with various theoretical predictions, the two-electron momentum distributions along the laser polarization axis exhibit a pronounced V-shaped structure, which can be explained by the role of Coulomb repulsion and typical (e,2e) kinematics.
157
Correlated multi-electron dynamics in ultrafast laser pulse - atom interactions
Artem Rudenko,K. Zrost,Bernold Feuerstein,V. L. B. de Jesus,C. D. Schröter,R. Moshammer,J. Ullrich +6 more
TL;DR: In this paper, the results of the detailed experimental study of multiple ionization of Ne and Ar by 25 and 7 fs laser pulses were presented, where the highly correlated "instantaneous" emission of up to four electrons was triggered by a recollisional electron impact.
108